<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>外部样式</title>
	<link rel="stylesheet" type="text/css" href="1.css">
</head>
<body>
    <div  class="header">
        <div class="center">
	        <div class="zuo"></div>
	        <div class="you"></div>
	       
	    </div>
    </div>
	<div class="body"></div>
	<div class="bottom"></div>
</body>
</html>